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an•a•cous•tic



Pronunciation: (an"u-kOO'stik), [key]
adj.
of or pertaining to the upper portion of the earth's atmosphere and to interplanetary space, where sound cannot be transmitted because molecules are too far apart to serve as a transmitting medium.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Anacostia RiverAnacreon

 

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